Woodworking-machine.



[No. 761,492. PATENTEDMAY a1, 1904.

N. J. HUTGHINSON. WOODWORKING MACHINE.

APPLIOATION'IILED MAY 28, 1902.

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No. 761,492. PATENTED MAY 31} 1904.1

N. J. HUTGHINSONA; WOODWORKING MACHINE.

APPLICATION FILED MAY 28. 1902.

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M w I 35% No. 761,492. PATENTED 'MAY 31, 1904.. N. J. HUTGHINSON.

WOODWORKING MACHINE.

APPLICATION FILED MAY 28, 1902.

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No. 761,49 2. v PATENTED MAY 31, 1904.-

N. J.,HUT G HINSON.

WOODWORKING MACHINE.

APPLICATION FILED MAY 28.1902.

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Savant I -PATENTED MAY 31, 1904. N. J. HUTGHINSOR W'OODWORKING MACHINE.

APPLICATION FILED MAY 28. 1902.

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i No. 761,492.

Y UNITED STATES" Patented May 31, 19041 PATENT OFFICE.

NATHANIELJOHN HUTCHINSON, OF TORONTO, GANADA.

' WOOVDWIORKING-MACHINE.

SP EGI FICAIIION fOrming part of Letters Patent No. 761,492, dated May 31, 1904. I Application filed May 28, 1902. Serial No. 109,280. (NomodeL) T on whom it may concern/.

v Be it known that I, NATHANIEL JOHN HUTOH- INSON, a subject of- His Majesty the King of Great Britain, residing at Toronto, in the Province of Ontario and Dominion of Canada,

ments in Woodworking-Machines; and I do declare the followingto be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomakeand use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which'forrn a part of this specification.

My invention. is an improvement on those Woodworking-machines which are constructed for the purpose of cutting or sawing tenons of different shapes in' 'boards or pieces of wood forming the sides and ends 'in the manufac ture of dovetailed boxes; and my present invention relates especially to improvements on the woodworking-machine forming the subject-matter ofUnited States Letters Patent No. 666,314, issued to myself on the 22d day of January, 1901.

- My invention has for its object to increase the usefulness of the former machine by adding improved featureof construction'thereto;

and my invention consists in 'the construction, combination, and arrangement of parts hereinafter particularly described and then sought to be definitely claimed. 1

' Inorder that my invention may be fully understood, I will proceed-to describe it with reference to the. accompanying drawings, in Which 1 i Figure 1 is a side elevation of my improved woodworking-machine for cutting or sawing' tenons in ,the end boards for dovetailed boxes. Fig. 2 is an elevation of the opposite side of the machine. Fig. 3 is a vertical longitudinal section of the machine,

the direction of the arrows.

taken on the line 33 ofFig. ilooking in Fig. 5 is ,a crosssection taken on line 4 i of Fig. 3. Fig. 1 Fig. 5 is a top plan view of the machine. Fig. 6 is a side elevation of the machinefor cutting tenons in the side boards. Fig. 7 is a vertical longitudinal section of the same, and Fig.

8 is a detail of one of the rocking hubs; Figs. 9 and 10, details of parts. Fig. 11 is a perspective of parts of the table or platform and feed-ram with a board shown in dotted lines 7 in position'on the front table or platform. have invented certain new and useful Improveverse upper beams 4.' The upper beams 4' support Ways 6, upon which. slide a pair of parallel cross-heads 7. As a means for advancing and returning the cross-heads .7, so as to accommodate different dimensions of boards to be operated upon and for holding the cross-heads 7 fixedly in the position to which they are'moved, I- employ right and left hand screW- threaded shafts 8, journaled in the side plates 1 2 of the main frame and working in internally-screW-threaded boxes 9, depending from. the cross-heads 7.

10 represents sprocket-wheels fixed to the projecting ends of these shafts 8 on one or both sides of the" machine, which are connected by a sprocket-chain 11'. 12 is a crank-handle secured to one of the shafts 8, whereby the chain may be operated theshafts in unison. The lower section of the ,-sprocketchain travels over an idle sprocket-Wheel 13, journaled'on a stud 14,

projecting from an adjustable plate or bracket 15, having bolt-and-slot connection 16 with the side plate 1 of the main frame, and thus providing a chain-tightening device.

17 represents bearings secured to the crossheads 7 and carrying the mandrels or shafts 18 of the cutters or saws 19, these shafts being operated by pulleys 20.

21 represents the sides of the hopper, be tween which the boards are'supported one above the other, so as to be fed to the cutters or saws from beneath the tier one at a. time. These sides 21 are formed with horizontal ledges 21, on which the'boar'ds are placed, with vertical retaining-flanges .21" and with the sides of the hopper 21. The lateral movement of the sides of the hopper-platesis limited by the screw-bolts 23, secured to the bearings through the slots 21.

17 represents internally screw threaded lugs formed on the bearings 17 in which are mounted hand-screws 24, connected with the lateral extensions 21 of the sides of the hopper 21, so as to provide means for adjusting the latter according to the dimensions of the boards operated on. The vertical retainingfianges 21 on the sides 21 do not extend down to the horizontal ledges thereof, so that openings are provided beneath the flanges through which the lowermost board is rammed. The height of the openings is regulated for differ ent thicknesses of boards by slides 25, formed with slots 27 and adjustably supported on the vertical flanges and clamped thereto by thumbnuts 26.

28 represents knees or curved holders for directing the boards into place between the hopper sides 21 and are supported on the horizontal ledges 21 and have bolt-and-slot connection 28 therewith. The cross-heads 7 also carry stands 29, formed with overhanging arms 29, having grooved guide-heads 29 and inclined rear extensions 29 The guid e-heads 29 carry pressure-bars 30, which are provided with dovetail tenons 30, that slide in ways 30 formed in the guide-heads, as shown in Fig. 3. On one side the guide-heads 29 are provided with gibs 29, which are held against the pressure-bars 30 by set-screws 31. These set-screws may be adjusted to tighten up the gibs 29 and thus take up wear and' prevent the pressure-bars from wabbling and rattling. The pressure-bars 30 are adjusted vertically according to the thickness of the boards by hand-screws 32, working through internal screw-threaded lugs 30 on the pressure-bars 30 and bearing against the overhanging arms 29. Yielding pressure is im parted to the pressure-bars 30 by means of coil-springs 33, two of each of these springs being provided for each pressure-bar 3O.

29' represents lugs on the stands 29, to-

which the lower ends of the springs 33 are fastened by hooks 34, while the upper ends of the springs 33 are suspended by hooks 35 from arms 36, hinged to the inclined extensions 29 of the stands, and bearing at their free ends upon lateral pins or projections 30, formed on the upper ends of the pressurebars 30. Each pressure-slide 30 carries at its lower end a cross bar or head 37 to which is secured a flat lower spring 38, substantially flush with the lower edge of the cross head or bar 37 and a flat upper spring 39, reinforcing the lower spring. The lower springs are adapted to bear on the top of the boards to be cut when the latter are passed beneath the cross heads or bars 37, which are clear of the top of the boards as the boards are passed through the machine. Secured to the inner sides of the cross-heads 7 are guide-blocks 40 and 40 and rest blocks 40 longitudinally grooved or channeled to receive a pair of reciprocating feeders or rams 41, having recesses 41 at their front ends to adapt them to fit over a transverse slide-bar 42, extending across the machine and having its ends located in slotted guides 43, formed in or secured on the side plates of the main frame. This transverse slide-bar 42 is moved back and forth by means hereinafter described, so as to advance and return the sliding feeders or rams 41 intermittently. Located beneath the cutters or saws are platforms 46, provided with chip-breaker blocks 46, kerfed to receive the cutters, said platforms being secured to sliding bars 47, guided in suitable ways 47 and carried by the cross-heads 7, through which bars the platforms are raised to lift the boards to the cutters or saws and then lowered to permit the board to be brought into position to be advanced by the rams to the next position or to be pushed out of the machine. The guideblock 40 has its upper edge in the same plane as the platforms when the latter are in their normal position, so as to provide a bridge between the platforms for supporting the boards as they are moved along from one platform to the other. The lower ends of the sliding bars -47, which carry the platforms, are attached to cross-bars 48, preferably by recessing the bars 47, as shown at 47, and having the bars 48 fitting therein. The ends of the cross-bars 48 extend through guide-slots 1 2 in the side plates of the main frame and fit in caps 47, to which the cross-bars are bolted. The platforms are fitted with a steel sharp edge piece 50, which is set on the top of each platform and projects about one thirtysecond part of an inch above the platform, which edge pieces prevent the boards from shifting endwise while on the top of the platforms. The sliding feeders or rams 41 reciprocate beneath the tier of boards and are each provided with three stops 44, adjustably secured thereto by bolt-and-slot connections 45. The stops on the rams are provided for the purpose of advancing the boards from the tier of boards in the hopper through themachine. At the first stroke of the machine the first or front stop takes a board from the bottom of the tier and slides it onto the first platform for the first set of cutters or saws to operate on and then recedes. The second or intermediate stop moves the board from the first platform over the bridges formed by the guide-blocks 40 to the second platforms for the second set of cutters or saws to operate on and then recedes. The third or rear stop pushes the board from the second platform out of the machine. After three boards have been introduced then in each feeding movement of the rams three boards are simultaneously moved, one by the last stop from the second platform and out of the machine, another by the second stop from the first platform and over the bridges to the second platform,and the third from the hopper to the first platform, each board thustaking the place of the board immediately in advance of it and all three moved at the same time.

The driving mechanism is as follows: 51 is the driving-shaft, extending through the -side plate 1 of the mainframe and mounted in brackets 52 and 53, respectively, to the outer and inner sides ofthe side plate.

5 1is the driving-pulley, loosely mounted on;

- the driving-shaft and having a suitable fricthe side plates of the main frame.

1 the upper-.crank-shaft.

tion .or other clutch connection 55 with the shaft. The outer member ofthe clutch is provided with an arm 56, connected to a shifting-rOd 57, extendingacross thefront'of the machine through the side plates of the main frame and provided with a handle 58 for mov-' ing the rod. The inner end of the drivingshaft 51 has a pinion '59 fixed thereto, which meshes with a larger gear-wheel 60, cast with ,a pinion 61 on its hub and mounted on an means of upper connecting-rods 67, pivoted at one end to the transverse slide-bar 42 and attheotherend to levers 68, fulcrumed at their lower .ends on studs 69, projecting from The levers 68 areoscillated by means of rods 70, connectingthem with the cranks of the upper crankshaft 62.- The cross-bars which raise the platformshave their capped ends pivotally connected to the links 71, which at their opposite ends are pivotally connected to the inner arms of bell-crankfleversiQ, fulcrumed to the side plates ofthe main frame and having their other arms pivoted to the ends of conmeeting-rods 7 3, which near their inner ends are provided with rocking hubs 74:, formed with holes or eyes 73. I r

, 75 represents rods which are connected at one end with the cranks of the lowercrank- Shaft 63 and extend through the holes or eyes 73 of the rocking hubs 74: and provided at .that end with nuts 7 6 to enable them to catch with the connecting rod of the bell crank levers at the proper time to lift the platform. The machine being timed by the elliptical gears 66 66, the boards are moved along in about one-third revolution, leaving two-thirds of a revolution for the platforms to" raise the boards up through the cutters or saws and back again before the rams are again moved forward to shift the boards, the rams having moved to the front duringthe time that. the

' prevent jar. I the movement of the connectingcross bars48 f of the platforms so that the bars will stop at; the right place to bring the platforms level q squarely to the Saws.

platformsmove up and down again. The" connecting-rods 75, which connect With thelower cranks, are allowed to have about onethird of their stroke in lost motion. This is provided for by allowing the rods to slide through the holes in the rocking hubs before the nuts catch the hubs to lift the platforms.

Rubber cushions 77 may be set inside the slots 1 2 of the side plates l 2, at the bottom thereof, to receive the impact of the cross-bars to For the purpose of regulatingwith the ledges on the sides of the hopper between which the boards are placed I provide lugs 7 8 on the sides of the frame and pass set screws 7 9 through them, so that the cross-bars. 18 will contact with and be limited in their 1 down movement by said set-screws.

In Figs. 1, 2, 3, 1, and 5'of the drawings I have illustrated the arrangement'of saws and platforms for tenoning the end boards of a inches or thereabout, so as to form a straight line of cut on the inside. The saws are set on one set will cut one side of the dovetail and the other set the opposite side; but the saws are on a'level, and the platforms rise straight up oriperpendicular to the plane of the machine.

In Figs. 6, and 7 of the drawingsI illustrate the arrangement of saws and platforms and standards for cutting or tenoning the side boards of the box. I The saws are all the same size and are set bevel or inclined, as shown, but parallel to the sides of the machine, instead of diagonally thereto, The platforms are also set bevel or at an inclination and move at an in'-- clination; but the tops of .the platformsare level or horizontal, so as to present the boards With the exceptions box, the saws varying in size from six to ten an angle or diagonally, as illustrated, so that noted the two machines are the same in fea tures of -oonstruction and are the same in op eration. While the sawsfand platforms and other parts for cutting the ends of boxes are illustrated on a separate framework from the corresponding parts for cutting the sides of boxes, yet the two sets of, devices .arenecessary for cutting or dovetailing the parts necessary to makea complete box, and it is immaterial whether they be mounted on the same or different frames.

One simply supplements the operation of the other, so as to form the tenons necessary to make a complete box and toenable the initiatory product of one to be completed by the supplemental product of the other. It will therefore be observed that while the features common to both may beused with either, yet they are generic to both.

. I haveillustrated and described with par: ticularity the preferred details of construction and arrangement of parts,- as a machine so con-. structed has been found' 'to work most satisfactorily; but I do not mean to confine myself to such particular features of construction and arrangement except as may be specifically defined in the claims therefor, as changes can be made and essential features of my invention still be retained.

Having described my invention and set forth its merits, what I claim is 1. In a dovetailing-machine, the combination with the cutters, of a reciprocating feedram provided with a series of stops arranged one to the rear of the other and adapted to be brought between and into contact with a corresponding numberof boards to feed them simultaneously through the machine, means for reciprocating said ram, platforms for lifting the boards to the cutters at right angles to their feed through the machine, substantially as described.

2. In a dovetailing-machine, the combination with the cutters, of a plurality of platforms for lifting the boards to the cutters in a plane at right angles to their feed through the machine, a bridge between the platforms for supporting the boards in their travel from one platform to the other, and a feed-ram for moving a board from one platform to the bridge and from the bridge to the other platform when the platforms and bridge are in line with each other, substantially as described.

3. In a dovetailing-machine, the combination with the cutters, of a vertically-movable platform for lifting a board to the cutters in aplane at right angles to its feed through the machine, means for feeding the board through the machine, and an edged member secured to the ends of and projecting above the top of the platform to guard against lateral movement of the board on the platform, substantially as described.

4. In a dovetailing-machine, the combination with the oppositely-disposed cutters and a vertically-movable platform for moving the board to the cutters in a plane at right angles to its feed through the machine, and means for feeding the board through the machine, of a presser-bar at each side of the platform for clamping the board to the platform, and a spring-influenced hinged arm bearing against a part of each presser-bar to exert pressure thereon, substantially as described.

5. In a dovetailing-machine, the combination with the oppositely-disposed cutters and a vertically-movable platform for moving the board to the cutters in aplane at right angles to its feed through the machine, and means for feeding the board through the machine, of a presser-bar at each side of the platform for clamping the board to the platform, a hinged arm bearing against a part of each presserbar, and a spring connected with the hinged arm between its fulcrum and the part of the arm which bears against the presser-bar, substantially as described.

6. In a dovetailing-machine, the combina tion with oppositely disposed cross heads movable one toward and away from the other,

of cutters and a presser-bar carried by each of said cross-heads, vertically-movable platforms for lifting a board to the cutters in a plane at right angles to its feed through the machine, reciprocating feed-rams connected with said cross-heads so as to move therewith, a transverse bar connecting said rams and with which the rams have a sliding connection, and means for moving said cross-bar to reciprocate said rams to move the boards through the machine between the oppositely-disposed cutters, substantially as described.

7. In a dovetailing-machine, the combination with a pair of cutters arranged one in advance of the other, and means for feeding a board through the machine, of vertically-movable platforms one in advance of the other for lifting the boards in a plane at right angles to their feed through the machine and presenting them to the cutters, levers connected one with each platform, a rod connection between said levers, and means for actuating said rod for lifting the platforms in unison through the connected levers, substantially as described.

tion with a pair of cutters arranged one in advance of the other, of movable platforms one in advance of the other for presenting boards to the cutters, bell-crank levers having a link connection one with each platform, a rod connecting the bell-crank levers, a driving-rod having a sliding connection with said connecting-rod and adapted in movement in one direction to actuate said connectingrod and move the platforms through the bell-crank levers, substantially as described.

9. In a dovetailing-machinc, the combination with a pair of cutters arranged one in advance of the other, of movable platforms one in advance of the other for presenting boards to the cutters, bell-crank levers having a link connection one with each platform, a rod connecting the bell-crank levers, and a drivingrod for actuating said connecting-rod, said rods being connected together by a rocking hub in which the driving-rod has a sliding movement in one direction and against which a part of the driving-rod contacts in its movement in the opposite direction for actuating the connecting-rod, substantially as described.

10. In a dovetailing-machine, the combination with the cutters and a movable platform for presenting the boards to the cutters, of a reciprocating ram for feeding boards to the platform, an oscillating lever having a rod connection with the ram, a crank-shaft provided with an elliptical gear and having a rod connection with the oscillating lever, a driven shaft having an elliptical gear meshing with the elliptical gear of the crank-shaft and a connection with the platform for timing the reciprocation of the feed-ram and platform, substantially as described.

11. In a .dovetailing-machine, the combina- ITO o 8. In a dovetailing-machine, the combination with cutters and a platform for presenting boards to the cutters, of a reciprocating ram for feedingboards to theplatform, anoscillating lever having a rod connection withloss-motion connection with the lever of the movable platform, substantially as described.

12. In a dovetailing-machine, the combination with a pair of cutters one in advance of the other and with movable platforms one in advance of the other for presenting boards to the cutters, of a reciprocating feed-ram for feeding boards to the platforms, an oscillating lever having arod connection with the feedram, a crank-shaft provided with an elliptical gear and having a rod connection with the oscillating lever, a driven crank-shaft having an elliptical gear meshing with the elliptical gear of the other crank-shaft, bell-crank levers having a link connection with the platforms, a rod connecting said bell-crank levers, and a rod having a loss-motion connection with the connecting-rod of the bell-crank levers at the opposite end connected with the ellipticalgear-driven crank-shaft, substantially as described.

13. In a dovetailing-machine, the combination with a pair of cutters one in advance of the other, vertically-movable platforms one in advance of the other for lifting and presenting boards to the cutters in a plane opposite to their feed through the machine, a reciprocating feed-ram for feeding boards to the ,platforms when in their lower position, mechanism for lifting the movable platforms, said mechanism having a period of its operation in loss motion, and mechanism for reciprocating the feed-ram, said mechanism being timed to move the ram toward the front of the machine during the timethat the platforms move up and down again to their normal position and then to move the ram toward the rear of the machine after the tables are brought to their normal position, substantially as described.

14. In a dovetailin -machine, the combination With two sets of cutters,the cutters of each set being oppositely disposed, of two sets of movable platforms, each set composed of two platforms oppositely disposed and having depending sliding bars, cross-bars connecting the sliding bars of each set of platforms, and adjustable set-stops positioned beneath the. connecting cross-bars for adjusting the tables in alinement, substantially as described.

15. A woodworking-machine comprising a main frame, a pair of cross-heads having depending internally screw threaded boxes, right and left hand screw threaded shafts working in the boxes and journaled in the main frame, sprocket-wheels on the ends of the shafts, a sprocket-chain connecting the sprocket-wheels and means for turning one of the shafts for adjusting. the crossheads, substantially as described.

16, A woodworking-machine comprising a cross-head, a stand carried by the cross-head formed with a guide-head,a pressure-slide car: ried by the guide-head, means for supporting the pressure-slide upon the stand, the bars hinged at one end to the stand, and having their free ends resting upon the pressure-slide, and the coil-springs connected to the bars and to the stand, substantially as described.

17. A woodworking-machine comprising a pair of cross-heads, grooved guide-blocks secured to the inner sides of the cross-heads, the rams sliding in the guide-blocks, having stops secured thereto, atranverse slide-bar to which the rams are connected, and means for operating the slide-bar to reciprocate the rams, substantially as described.

18. A woodworking-machine comprising a pair of cross-heads, grooved guide-blocks serams each provided with three stops, a transcured to the inner sides of the cross-heads, the

ed, and means for operating the slide-bar to reciprocate the rams, substantially as described.

, lower the boards, and means for reciprocating the rams to advance the boards and recede therefrom intermittently, substantially as described. V

n testimony whereof I aflix my signature in presence of two witnesses.

NATHANIEL JOHN HUTCHINSQN.

Witnesses:

A. F. LOBB, R. CoNNELL. 

